Abstract
The antibacterial activity of aqueous extract of Cymbopogon citratus leaf were assessed against some selected bacterial isolates including Escherichia coli ATCC 29214, Salmonella enterica Typhi ATCC14028, Bacillus cereus ATCC 14579, Proteus vulgaris ATCC15315 Shigella flexneri ATCC 120233, Listeria monocytogenes Scott A, Listeria monocytogenes ATCC7644, Staphylococcus aureus ATCC 25823, Staphylococcus aureus ATCC 25923 and Staphylococcus aureus ATCC 29213 in vitro at different concentrations. Results obtained showed that the aqueous extract of Cymbopogon citratus leaf had antibacterial activities against test bacteria. The Minimum Inhibitory Concentration (MIC) of the aqueous extract of C. citratus leaf was observed to be 500mg/ml against Listeria monocytogenes Scott A, Staphylococcus aureus ATCC 25823, Salmonella thyphimirium ATCC 14028, Proteus vulgaris ATCC 15315 and S. aureus ATCC 25923 while it was 750mg/ml against L. monocytogenes ATCC 7644, Bacillus cereus ATCC 14579 and Shigella flexneri ATCC 120233. The antibacterial efficacy of the leaf extract of C. citratus can be ascribed to the pytochemicals in the extract; hence, C. citratus may be useful in treating infections caused by these bacteria.
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